EP 0326433 B1 19960403 - High contrast photographic materials containing microcrystal dispersions of hydrazines
Title (en)
High contrast photographic materials containing microcrystal dispersions of hydrazines
Title (de)
Photographische Hochkontrastmaterialien, die Mikrokristalldispersionen von Hydrazinen enthalten
Title (fr)
Matériaux photographiques à haut contraste contenant des dispersions microcristallines de hydrazines
Publication
Application
Priority
GB 8802024 A 19880129
Abstract (en)
[origin: EP0326433A2] A negative acting photographic material capable of producing a high contrast image comprising a photographic silver halide emulsion in association with a water-insoluble hydrazine in the form of microcystals having a mean particle size of not more than 10 microns, preferably 0.05 to 5 microns. The microcrystals may be in the photographic silver halide emulsion or in a layer adjacent thereto.
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/06 (2006.01)
CPC (source: EP)
G03C 1/005 (2013.01); G03C 1/061 (2013.01)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0326433 A2 19890802; EP 0326433 A3 19910116; EP 0326433 B1 19960403; DE 68926127 D1 19960509; DE 68926127 T2 19960829; GB 8802024 D0 19880224; JP H023033 A 19900108
DOCDB simple family (application)
EP 89300866 A 19890130; DE 68926127 T 19890130; GB 8802024 A 19880129; JP 1936389 A 19890127